Subject 'Machinery Technique'

Year:   2015/2016    2016/2017    2017/2018    2018/2019    2019/2020    

Forces in machines. Constraints and reactions. Geometrical and analytical addition of forces. Concurrent forces system. Couples and moment of force. Equilibrium of a system of forces.
Internal forces and stresses. Safety factor. Tension and compression of axially loaded shafts. Strength calculations. Changes in length. Contact and shear stresses.
Plane area parameters. Torsion of shafts. Strength calculations, deformations. Bending of beams. Stress diagrams. Combined loadings. Failure theories.
Tolerances and fits. Geometrical tolerances. Surface roughness.
Joints of machine elements: rivets, welding, shrink fits, threaded fasteners, keys, pins, toothed joints, etc. Shafts and axles. Rolling-element bearings. Sliding bearings.
Mechanisms. Spur gears, helical, bevel and worm gears. Analysis of gear-tooth-bending stress and surface durability. Gearboxes. Power screws. Belt and chain drives. Constant- and variable-speed friction drives. Couplings. Springs.

A general account on engineering materials and their properties;
an account on forces in machines and sources of these forces;
knowledge on statics, equilibrium of force systems, and calculation of reaction forces;
knowledge on internal forces, stresses, calculation of strength and rigidity;
knowledge on design of structures, selection and calculation of machine elements;
an account on calculation of structures using numerical methods.

a clear comprehension of the forces in machines and structures and of the Sources of these forces;
ability to calculate details and structures under various loading;
knowledge on types of machine elements and ability on their selection and calculation;
a comprehension of strength and rigidity calculation by numerical methods.

Lectures, tests.

Penkov I. koost. Masinatehnika. Loengukonspekt. Tallinn, TTÜ, 2007.
Kleis I., jt. Rakendusmehaanika. Tallinn, Valgus, 1984.
Dubeikovski J, jt. Tehniline mehaanika. Tallinn, Valgus, 1987.

The course ends with an examination. Positively executed tests, individual work and laboratory works are the prerequisites of the exam. The examinee must answer written questions within the framework of lecture material. The final grade will turn out from the average grades of tests, individual work and exam.

2018: ET  

2017: ET  

2016: ET  

2015: ET